We present the results of a spectroscopic study carried our on films of poly-p-phenylene sulfide (PPS) doped with FeCl3 in different solvents. The doping and dedoping processes have been followed by electronic, infrared, and Raman spectra both in a dry atmosphere and in the presence of moisture. For the first time in doped PPS two strong Raman bands have been observed at frequencies close to those of the infrared-activated vibrational modes. Several other weaker Raman lines, originated by a breakdown of the selection rules, have been shown to be selectively activated in the ionized form. These new data, when combined with the results of the infrared and electronic studies, provide a complete picture of the electronic and vibrational structure of doped PPS. This allows also the assignment of those bands which are originated by chemically modified PPS.